code: def test_world_has_only_basic_numbers(self):
      valid_actions = self.world.get_valid_actions()
      assert "n -> -1" in valid_actions["n"]
      assert "n -> 0" in valid_actions["n"]
      assert "n -> 1" in valid_actions["n"]
      assert "n -> 17" not in valid_actions["n"]
      assert "n -> 231" not in valid_actions["n"]
      assert "n -> 2007" not in valid_actions["n"]
      assert "n -> 2107" not in valid_actions["n"]
      assert "n -> 1800" not in valid_actions["n"]
  
imports: from __future__ import with_statement
  from __future__ import division
  from __future__ import absolute_import
  from __future__ import print_function
  import pytest
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data.tokenizers import Token
  from allennlp.semparse import ParsingError
  from allennlp.semparse.contexts import TableQuestionKnowledgeGraph
  from allennlp.semparse.worlds import WikiTablesWorld
label_desc: Use image node_id 8 for calling the TestWikiTablesWorld obj's underlying member method code with example usage: obj.test_world_has_only_basic_numbers() without return types